A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Using Only Five 5's and any mathematical operator make sum as 37

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Can you solve the below tricky visual equation?

What has one letter and starts with an E?

Name a key which is hardest to turn.

Imagine you are in a room with no windows or doors. How will you get out?

I am lying and I always lie. Tell me whether I am lying or telling the truth.